2001-2

Three Swedish pilot projects have been carried out as part of the Technology- Validation Project (TVP) “Integrated Wastewater” (1997-2000), supported by the European Commission. The overall objective of the TVP project was to develop and validate an integrated methodological and technological framework for the pollution impact analyses of complete urban Wastewater systems on the receiving […]

Demonstration studies were accomplished in the cities of Helsingborg, Halmstad and Sundsvall as part of the Technology Validation Project (TVP) “Integrated Wastewater” (1997-2000). All three projects were focused on the analyses of the interaction between the sewer system and the wastewater treatment plant under variable operational conditions, created by the application of real-time control (RTC) […]

This paper is based on a literature survey concerning current regulations and general practices of sludge use and disposal in the United States, European Union (in particular Sweden) and Chile. Almost all regulations analysed in this paper require relatively similar hygienisation procedures. Besides being based on the hygienisation method applied, some restrictions are related to […]

The following article is a literature review on possibilities of microalgal improvement of wastewater treatment in oxidation ponds in cold climate. Furthermore the paper covers the possible commercial microalgal products that can be produced using the nutrient resource in the wastewater. Very few investigations have been performed in cold climate. There is evidence that microalgal […]

Redox sensors have been in use at the wastewater treatment plants in Odense, Denmark since 1990 Starting in April 2000 at the Northeast WWTP the signals from ammonium and redox sensors have been employed for the automatic control of the nitrogen removal process. This resulted in a reduction of the effluent total nitrogen concentration from […]

The redox condition is an important factor controlling e.g. the mobility of compounds in groundwater. Reliable measurements of redox potentials in water are problematic to perform for a number of reasons. A fundamental reason is that natural waters are seldom, if ever, in a state of redox equilibrium. Each redox couple has its own potential […]